Friction-clutch.



F. J. LEMLEY.

FRIUTION CLUTCH.

APPLIUATION FILED 00T. 23,1909.

Patentad Feb. 2, 1909.

2 SHEETS-SHEET 2.

`strain andv enablin Amade in an'easy an UNITED STATES PATENT OFRICE.

Specication ofLetter Patent.

vEatanted Feb. 2, 1909.

Application tiled October 23, 190B. Borla! No. 459,127.

To all whom 'it 'may concern:

Be it known that I, FREDERICK J. LEMLEY,

`a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Im rovements in F riction-Clutches, of which t e following is a specification.

This invention relates particula'rlyto friction clutches of the type ordinarily einloyed in connection with sections of shaftmg, or iii connection with the -transmission of ower throu h pulleys, gearing, etc.

n clutches org this character it is desirable to provide means for regulating the throw of the movable clutch member, and the pres .ent invention more particularly relates to the means provided for adjusting the clutch in such manner that the regulation will be uniform on all sides of the movable clutch member, lthereby equally distributing the the adjustment to be convenient manner.

Other objects of the invention are to so construct the parts thatthe `clutch willl be strong and durable and at the saine time easl to assemble and convenient to operate.

,Further objects will appear from a detailed description of the inventionz which consists in the features of construction and 4combination of parts hereinafter described and claimed. i

AInithe drawings Figure 1 illustrates two sections of shaftin showing a longitudinal section of the preferred form of the resent invention; Fig. 2 a cross sectiona view taken on line 2-,2 of Fig'. 1; Fi 3 a longitudinal section showing a modi ed form of theclutch; and Fi 4 a similar view, showing a second modi cation.

.According to Figs. 1 and 2, the clutch comprises an active member 5 and a coacting member 6, applied respectively, to shaft sections 7 and 8. 'Izhe active member, which embodies the essential features of the present invention, consists of a fixed section 9 and a movable section 10. The fixed section is in theform of a sleeve 11 having, at its inner end, an outwardly projecting web or lian e 12, which carries a clutch ring 13 of woo leather or other suitable frictional substance. The movable member 10 is in the form of a collar 14 provided, around its periphery, with screw threadsv 15; which collar has outwardly extending therefrom a ange 16 provided with a beveled recess 17 on its inner face which recess carries a ring shaped clutch block 18 of wood, leather or similar material, which block is beveled on its rear face to register with the beveled surface of the recess within which it is can ried. The collar 14, at suitable equi-distant points, is provided, on its inner face, with slots 19, the function of which will hereafter appear; and the periphery of the collar has screwed thereonto an adjusting ring 20, provided on its outer edge with an inwardly extending flange 21 affording a suitable bearing surface for the tog les 22, which may be of any suitable numer, as, for instance, 3, dependin upon the character of the work to which t e clutch is sub'ected.

Each of the toggles is provide with a thumb 23, which contacts with the flanged end of the adjustable ring 20; and the toggles are pivoted through their inner ends by means o pivot pins 2 4. The pivoted'ends of the toggles lie between {iaiiges 25, which outwardly project from the hub 11, which hub,lintermediate the flanges, is recessed to provide a suitable clearance for the o eration ofthe toggles. The ilanges 25, whic extend longitudinally of the hub, are connected at their inner ends by a cross flange 26, which serves to reinforce the side flanges and strengthen the construction immediately adjacent the ivotal mounting for each of the toggles. ach of the toggles is bifurcated at its outer end 27, to receivea link 2S, which link is pivoted in ears 29 on a. slidably grooved clutch collar `30 of the usual' character. In order toprovi'de for the easy regulation of the adjustablerngQ/O, the latter is in the form of a s lit rin provided, adjacent to the split eii s, with u s 31 through which is entered a screw bolt'g2, which pei'- mits the ring, after adjustment, to be clamped ti htly onto the screw threads 15 of the colar 14, so that when the split adjusting' ring is clamped in place the construction wi be, in eiect, an integral one and the threads will be relieved from strain during the operation ofthe clutch.

The movable or active portion of the clutch previously described, cooperates with the coacting clutch member 6, which, as shown, is in the form of a hub 33, having awebPA outwardly projecting therefrom', which web is provided, around its periphery, with anhinwardl extendin flange 35, carrying n ring shape contact pate 36 whchis. secured to the flange by means of bolts 37, a suitable space 38 being atiorded intermediate thc plate and the web 34, for the reception of the web or tlange l2 on the acting portion of the clutch. The plate 36 is preferably recessed on each side to provide for the reception of the clutch blocks.

Fig. 3 shows a slightly modified form of construction in which, in place of the adjustable ring hitherto described, a plurality of set screws 39 are provided, which are entered into a boss 40, formed on the rear face of the flange 16, which set screws are adapted to be locked by means of jam nuts 4l of the usual type. ln other respects the construction is substantially identical with that previously described.

In the moditication shown in Fig. 4 an adjusting ring 42 is employed, which is similar to that previously described, save only that it is threaded on its outer surface instead of its inner surface, and is entered within a collar 43, and not outside of the collar like that shown in Fig. l. Moreover, the adjusting ring of Fig. 4 is provided with a flange 44 havin a set screw, or set screws 4.3 entered theretirough, the ends of which .set screws bear against the edge of the collar 43 and serve, when tightened, to lock the threads of the colla r, thereby performing the same function that is performed by the screw bolt 32 in the construction shown.

Jam nuts 4G are provided, in the construction of Fig. 4, to lock the set screws in adjusted osition. Other features of construction, il ustrated in Fig. 4 are substantially the saaie as the construction previously described, so that further description is deemed unnecessarv.

In all of the constructions the mode of o eration of the clutch is substantially tie same. When the grooved clutch collar is moved inwardly the links will be moved to a position which distends the free ends of the toggles, thereby causing the thumbs on the toggles to press avainst, the adgustable contact surface provided therefor, which ressure, will be equally a plied to all sides of the movable clutch mem r, thereby moving the collar and with it the clutch block 18, which will be brought into tight engagement with the enacting plate 36, and the two blocks, acting in o position to one another, will engage the p ate on opposite sides, and thereby set the clutch. The hubs of the active and assive clutch members are, of course, keye onto the res ective sections, but the movable clutch col ar 14 need not be keyed to the hub 11, since the flanges 25, operating within the slots 19, serve to hold the tixed and movable portions of the active clutch member in coperating relation with one another, so that there will be no loss in the transmission of torsional effort, and at the same time the slots 19 act as suitable guidcways for the longitudinal movement of the inovabl(` member of the active i-sutcli section. ln adjusting the throw of the toggles, the adjusting rings of either of the forms of construction. employing rino-s, can be regulated, and thereafter locled, which brings the contact surface for the toggles, either toward or from their pivotal niountings, so that a very substantial adjustment is provided. The saine result is accomplished 1n the construction of Fig. 3 by regulating the set screws and locking them with the jam nuts. The construction is one which permits easv assembling of the parts, and the various portions of the clutch as a whole, can be strongly and durably manufactured, which gives great strength and cilicicncy to the completed clutch.

What. l regard as new and desire to secure by Letters Patent is:

l. In a clutch, active and passive members, the active member comprising fixed and movable sections, each carrying clutch blocks adapted to engave the passive member, toggles on the fixeds section of the active member, and an adjustable member in the form of a split screw threaded ring screwed onto the movable member of the active clutch section and adapted to be clamped in adjusted position, substantially as described.

2. In a clutch, the combination of active and passive members, the active member comprisi a fixed section in the form of a hub provi ed with a flange or web carrying a clutch contact block, said hub being provided with flanges arranged in pairs, toggles pivoted between the flanges, and a movable section provided with slots registering with said flanges, said movable section carrying a clutch contact block, and adjustable means 106 carried by the movable member to afford a contact for the toggles, substantially as described.

3. In a clutch, the combination of active zuid passive members, the active member 110 comprisin a tixed section in the form of a hub provi ed with a flange or web carrying a clutch contact block, said hub being provided with tlanges arranged in pairs, toggles pivoted between the flanges, and a movable section provided with slots registering with said flan s, said movable section carrying a clutci contact block, and a rin" screw threaded to the movable member and affording a contact surface for the toggles, substantially as described.

4. In a clutch, the combination of active and passive members, the active member comprisin" a fixed section in the form of a hub provided with a flange or web carrying a clutch Contact block, said hub being provided with flanges arranged in pairs, toggles pivoted between the flan s, and a movable section provided with s ots registering with said flanges, said movable section carrying a clutch Contact block, and a s lit rin screw threaded to the movable mem er :in agording a Contact surface for the toggles, and means for clam ing the split ring in adjusted position, su stantially as described.

a. ln a clutch, the combination ot' active and passive members, the active member comprising' a fixed. section in the form of a hub provided with a flange carrying a clutch contact block, tbe hub being provided at suitable intervals with longitudinally extending Hanges, toggles pivoted to the flanges, and a movable clutch section in the form of a collar provided with slots adapted to receive the fianges, clutch Contact blocks carried by said collar, and a ring screw threaded onto said collar and affording a Contact surface for the toggles, substantially as described.

G. ln a clutch, the combination of active and passive members, the active member comprising a fixed section in the form of a liub provided with a fiange carrying a clutch Contact block, the liub being provided at suitable intervals with longitudinally extending flanges, toggles p1voted to the tact surface for the toggles, and means for clamping said split ring in adjusted position, substantially as described.

7. In a clutch, the combination of active and passive members, the active member comprising a fixed section in the form of a linb provided with a fiange carrying a clutch contact block, the hub bein provided at suitable intervals with longitudinally extending angcs, tofrgles lvoted to the flanges, and a movabTe clntc section in the form oi a collar provided with slots adapted to receive the flanges, clutch contact blocks carried by said collar, and a split ring screwed onto the exterior of said collar and provided with a screw bolt for clamping the free ends of said split ring together, substantially as described.

FREDERICK J. LEMLEY.

Witnesses W'ALKER BANNING, PmRsoN W. BANNING. 

